Draft Policy ARIN-2009-8: Equitable IPv4 Run-Out

Status: NRPM Sections,

Tracking Information

Discussion Tracking

Mailing List:

Formal introduction on PPML on 31August 2009

Origin - Policy Proposals 93: Predicable IPv4 Run Out by Prefix Size and 94: Predictable IPv4 Run Out by Allocation Window

Draft Policy - 31 August 2009 (with staff assessment)

Returned to AC's docket - 28 October 2009

Last call - 24 November through 10 December 2009

AC recommended adoption - 22 December 2009

Adopted and implemented - 13 January 2010

Public Policy Mailing List

ARIN Public Policy Meeting:


ARIN Advisory Council:

AC Shepherds:
David Farmer and Leo Bicknell


ARIN Board of Trustees:

18 December 2009


Previous version(s)


13 January 2010

Draft Policy ARIN-2009-8
Equitable IPv4 Run-Out

Version/Date: 24 November 2009

Policy statement:

Rename NRPM; Subscriber Members Less Than One Year

Replace NRPM with; Subscriber Members After One Year

After an organization has been a subscriber member of ARIN for one year, they may choose to request up to a 12 month supply of IP addresses.

When ARIN receives its last /8, by IANA implementing section, the length of supply that an organization may request will be reduced. An organization may choose to request up to a 3 month supply of IP addresses.

This reduction does not apply to resources received via section 8.3. An organization receiving a transfer under section 8.3 may continue to request up to a 12 month supply of IP addresses.


This policy is intended to ensure an equitable distribution of IPv4 resources as run-out of the ARIN free pool occurs. This is achieved by changing section of the NRPM to reduce the length of supply of IPv4 resources that may be requested when the IANA free pool runs-out. Equity is accomplished by reducing the window that an advantage or disadvantage can exist between competitors, that will be created when one competitor receives a final allocation just before run-out and another competitor does not.

Further this policy ensures equity between incumbent resource holders and new entrants by providing the same length of supply for each as the ARIN free pool runs out. This eliminates a potential bias toward incumbent resource holders that is created as a result of ARIN free pool run-out interacting with resource allocation slow start for new entrants in current policy.

This policy is similar to ideas in RIPE policy proposal 2009-03 (http://www.ripe.net/ripe/policies/proposals/2009-03.html), and has been adapted by discussion and for use within the ARIN region.

This policy is intended to be independent of other policies or proposals to reserve address space for IPv6 transition or other purposes. It is not intended to limit Transfers to Specified Recipients per section 8.3 of the NRPM.

This draft contains the elements that there seems to have been the largest consensus for on the floor of ARIN XXIV Public Policy Meeting in Dearborn, Michigan. Further, there was a strong preference that no changes be triggered until IANA free pool run-out.

Timetable for implementation: Immediate